/*
 * @Description: Test类
 * @Author: rendc
 * @Date: 2024-08-28 14:37:00
 * @LastEditors: rendc
 * @LastEditTime: 2024-08-28 16:45:30
 */
public class Test{
  // main方法
  public static void main(String[] args){
    // 输出hello
    System.out.println("hello");
    // 声明一个 int 类型的变量
    int a;
    // 初始化a
    a = 15;
    // a = 15.1; // 报错
    // 输出a的值到控制台
    System.out.println("a=" + a);// 15
    int b = 10;
    System.out.println("b=" + b);// 10
    int c = b;
    b = 100;
    System.out.println("b=" + b);// 100
    System.out.println("c=" + c);// 10 or 100
    // 字符类型
    char c1 = 'a';
    char c2 = 'B';
    char c3 = '你';
    char c4 = '好';
    // char c5 = '';
    // char c6 = 'abc';
    System.out.println("c1:" + c1);
    System.out.println("c2:" + c2);
    System.out.println("c3:" + c3);
    System.out.println("c4:" + c4);
    // System.out.println("c5:" + c5); // 编译错误
    // System.out.println("c6:" + c6); // 编译错误
    // int字面值量可以赋值给char变量
    char c7 = 48;
    System.out.println("c7:" + c7); // 0
    char c8 = 65;
    System.out.println("c8:" + c8); //A
    // 转义字符 \
    String s1 = "Hello, \"world\"!";
    System.out.println("s1:" + s1); 
    String s2 = "Hello, \\world\\!";
    System.out.println("s2:" + s2); 
    String s3 = "Hello, \n world!";
    System.out.println("s3:" + s3); 
  }
}